Stuck lifter (I think)

2000 XJ stock. Got a sewing machine thumping click on start up, sounds like a loud chug, goes away after it warms up. Tried Seafoam 1/3rd intake, third crank and a third gas, also did spark plugs. Still making that awful noise. Beside just replacing lifter any advice?

John is worried about it and we might just be able to help him.
How about butting out and letting that happen.

All I am saying is the noise may not be much of an issue, 4.0s are known for having a noisy valvetrain and lifters, it is well documented, and there are many different fixes people have tried. As long as it runs fine, has good oil pressure, and good compression it may not be a big problem.

All I am saying is the noise may not be much of an issue, 4.0s are known for having a noisy valvetrain and lifters, it is well documented, and there are many different fixes people have tried. As long as it runs fine, has good oil pressure, and good compression it may not be a big problem.

But YOU don't know that. He hasn't responded to my questions. I have a ton of experience with his issue.

O.P. - Just in case you hadn't visited his site - Cruiser managed a Jeep service department during the heyday of the I6, so you can't ask for better advice than he can offer. (Not to discredit 0tt444e who is a well respected forum member as well). The engine is known to be noisy and last for a long time, but you're worried enough about it to post a question (and it appears join the forum).

My $.02 -
Provide the details and let Cruiser help.

In my life I've been intimately involved with an I6 that ran great after 400k original miles, an I6 that ran great after 300k original miles and my current I6 that runs pretty well with 165k miles. None of them I would ever liken to a sewing machine, (And my mother and grandmother are expert quilters, so I'm no stranger to sewing machines), or have sounded like some engines I've heard that I might liken to a sewing machine.

If it goes away after it warms up I wouldn'tworry about it, that's normal lifter tick for a 4.0.

followed by:

Quote:

Originally Posted by 00t444e

Lifter tick is common for a 4.0 and nothing to worry about. They last 300K or more like that.

reinforced yet again

Quote:

Originally Posted by 00t444e

All I am saying is the noise may not be much of an issue, 4.0s are known for having a noisy valvetrain and lifters, it is well documented, and there are many different fixes people have tried. As long as it runs fine, has good oil pressure, and good compression it may not be a big problem.